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Desktop apps
Flat
Smallicons: logotypes
Tumblr, blog
DarkSlateGray
512x512
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Soft Social Icons
tumble, Tumblr
48x48
Pixel
Seize
Tumblr
16x16
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Metro UI Dock
Tumblr, Mirror
640x640
Mirror, Tumblr
3D
Isometrica Social Icons
105x105
Smooth
Chrome
39x40